Lifting-jack.



PATENTED MAR. 17, 1908.

M. L. JENKINS. LIFTING JACK.

APPLICATION FILED DBG.14, 190s.

N INVENTOR U WITNESSES THE uanms PETERS p0, wunmcmu, o. c

UNITED srnrns PATENT OFFICE.

MERRILL L. JENKINS, OF HARVEY, ILLINOIS, ASSIGNOR TO BUDA FOUNDRY &MANUFAC- TURING COMPANY, OF lIIIFAGO, ILLINOIS, A CORPORATION OFILLINOIS.

LIFTING-J'ACK.

Specification of Letters Patent.

Patented March 17, 1908.

Application filed December 14, 1906. Serial No. 347,753.

T 0 all whom it may concern:

Be it known that I, MERRILL L. JENKINS, a citizen of the United States,residing at Harvey, in the county of Cook and the State of Illinois,have invented certain new and useful Improvements in LiftingJacks, ofwhich the following is the specification.

My invention relates to lifting jacks designed to be used with cars forlifting the journals while the wheels are held down. The invention hasfor its objects; to provide an improved means for holding down the wheelwhile the journal is being raised; to provide a holding down meanshaving a maximum range of adjustment, and to provide a means forconveniently receiving the holding down means when not in use. These andother objects are accomplished by my invention, one form of which isshown in the accompanying drawings, in which Figure 1 is a plan view ofthe jack,

Figure 2 is a side elevation with the hol ing down means in operativeposition, and

Figure 3 is an end elevation of the jack with the holding down meansoccupying its receiving pocket.

Referring now to the drawings, 1 is the body of the jack, which may beof any im proved form, 2 is the lifting bar, which in the presentinstance is designed to engage the journal of the axle, 3 is a T rib foradjustably engaging the holding down member, 4 is the holding downmember provided with a head adapted to cooperate with the T rib, and 5is a retaining rib for engaging one side of the shank of the holdingdown member when such member is in the position as shown in Figure 3.The head of the rib is provided with parallel teeth 6, for engagingcorresponding teeth on the opposite face of the holding down member andso preventing any relative movement of parts when the holding downmember has been positioned. The holding down member 4 has, as shown, ahead portion 7 adapted to embrace the rib 3 and interlock therewith,which head as shown in Figs. 2 and 3 projects above the upper edge ofthe shank portion 8. The upper and lower edges of the shank 8 are formedalike so that either the upper or lower edge will cooperate with the rimof the car-wheel when the member is reversedflgThe holding down shank 8is I shaped similarly on both sides as above described for the purposeof securing a maximum adjustment along the T rib 3, and it will beapparent that after the holding down member has been adjusted to itshighest point with the head 7 projecting upward, it can be adjusted tostill a higher limit by taking such holding down. member from the T riband turning it over so that the head projects do\\"nwardly and the upperedge of the shank 8 is in a position above its previous position. Thisreversal of the position of the holding down member is possible becauseof the similarity of contour of the upper and lower edges of the shankportion 8, which arrangement it will be seen, enables the use of thelong head portion 8 without reducing the range of adjustment of themember. The retaining rib 5 is placed away from the T rib 2 a sufIicientdistance to permit of the reception of the shank between such rib andthe T rib, thus affording a convenient pocket for the shank 8 of theholding down member when such member is not in use. In order to hold theshank 8 in position between the retaining rib 5 and the T rib, a spring9 is provided as indicated in Figures 2 and 3, which spring is adaptedto press against the edge of the shank 8 when it is fitted between thetwo ribs. This arrangement provides for the secure holding of theretaining member when such member is not in use.

Having thus described my invention and illustrated its use, what I claimas new and desire to secure by Letters Patent, is the following;

1. In combination with the body portion of a jack having a verticalengaging T rib, of a holding down member comprising a shank withopposing edges of similar contour, and a head provided with a T slotsubstantially at right angles to the shank for making slidinginterlocking engagement with the rib and extending beyond one edge ofthe shank.

2. In combination with the body portion of a jack having a vertical Trib and a substantial parallel retaining rib, of a holding down membercomprising a head adapted to make sliding interlocking engagement withthe T rib and a shank adapted to fit the space between the T rib and theretaining rib.

3. In combination with the body portion In testimony whereof I havehereunto signed my name in the presence of the two of a jack having avertical T rib and a substantial parallel retaining rib provided. with aspring, of a holding down member comprising subscribed witnesses.

at head adapted to make sliding interlocking MERRILL L. JENKINS.engagement with the T rib and a shank 'Witnesses:

adapted to fit the space between the T rib E. M. ADAMS,

and the spring on the retaining rib. F. E. PLACE.

